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******MATH 12*******

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How about this.

One bad contains 4 white balls and 6 black balls. Another bag contains 8 white balls and 2 black balls. A coin tossed to select a bad, then a ball is randomly selected from that bag.

a. What is the probability that a white ball will be drawn?
b. Suppose a white ball is drawn. What is the probability that it came from the First Bag?


THE ANS : A>3/5

But how do you get those?

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